oops3
Class Build

Object
  Utils
      Visitor
          Recognize
              Build

All Implemented Interfaces:

Symbols

public class Build
extends Recognize

ParserFactory aspect: build a tree. The visitor uses package access.

Version:

3.5.0

Field Summary

protected boolean	addNull true (default) to record null for noInput.
protected Object	builder can modify the result of each Rule.
protected List[]	collections current collections for Permute.
protected List	current current collection.

Fields inherited from class Recognize

parser, scanner

Fields inherited from class Utils

error

Fields inherited from interface Symbols

badInput, endOfFile, firstSymbol, noInput

Constructor Summary

Build(Parser parser)

Method Summary

Object	build(Scanner scanner, Object builder, boolean addNull) delegate to recognize.
protected void	noInput() override processing of noInput: if addNull, add null to current collection.
protected void	permute(Parser.Permute permute, int a) override processing of an alternative of Permute: arrange to collect into collection for alternative.
protected Boolean	permutedList(Parser.PermutedList permutedList, int a, int done) override processing of an alternative of PermutedList.
Object	visit(Parser.Nonterminal nonterminal) override processing of a Nonterminal: visit rule; if result is ArrayList flatten, else add result to current.
Object	visit(Parser.Permute permute) override processing of a Permute: collect each alternative separately, add the collections, flattened, in order of definition.
Object	visit(Parser.PermutedList permutedList) override processing of a PermutedList.
Object	visit(Parser.Rule rule) override processing of a Rule: push current, visit right hand side, pop current; silently filter by invoking builder.
Object	visit(Parser.Token token) override processing of a Token: add value to current, then delegate to base class.

Methods inherited from class Recognize

advance, recognize, visit, visit, visit, visit, visit

Methods inherited from class Visitor

visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class Utils

className, error, error, fromString, getError, message, testScanner, toChars, toString, toString, warning, warning

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

builder

protected Object builder

can modify the result of each Rule.

current

protected List current

current collection.

collections

protected List[] collections

current collections for Permute.

addNull

protected boolean addNull

true (default) to record null for noInput.

Constructor Detail

Build

public Build(Parser parser)

Method Detail

build

public Object build(Scanner scanner,
                    Object builder,
                    boolean addNull)

delegate to recognize.

Returns:

result of visiting start rule, null on error.

visit

public Object visit(Parser.Rule rule)

override processing of a Rule: push current, visit right hand side, pop current; silently filter by invoking builder.rulename(int,List) or builder.rulename(List), if either, with the scanner's position and the current list; if filtering is not possible and rule is marked left-associative, send each element of the current list to its successor using List.add(E) and return the last element.

Overrides:

visit in class Recognize

Returns:

result value from builder or popped list.

visit

public Object visit(Parser.Nonterminal nonterminal)

override processing of a Nonterminal: visit rule; if result is ArrayList flatten, else add result to current.

Overrides:

visit in class Recognize

Returns:

null.

visit

public Object visit(Parser.Token token)

override processing of a Token: add value to current, then delegate to base class.

Overrides:

visit in class Visitor

noInput

protected void noInput()

override processing of noInput: if addNull, add null to current collection.

Overrides:

noInput in class Recognize

visit

public Object visit(Parser.Permute permute)

override processing of a Permute: collect each alternative separately, add the collections, flattened, in order of definition. Delegate to noInput() if an alternative has not been selected.

Overrides:

visit in class Recognize

Returns:

null.

permute

protected void permute(Parser.Permute permute,
                       int a)

override processing of an alternative of Permute: arrange to collect into collection for alternative.

Overrides:

permute in class Recognize

visit

public Object visit(Parser.PermutedList permutedList)

override processing of a PermutedList. Unfortunately, this is identical to permute; however, it needs to call permutedList.

Overrides:

visit in class Recognize

Returns:

null.

permutedList

protected Boolean permutedList(Parser.PermutedList permutedList,
                               int a,
                               int done)

override processing of an alternative of PermutedList. Unfortunately, this is identical to permute; however, it needs to call permutedList. If collected, a delimiter is appended to the alternative it follows.

Overrides:

permutedList in class Recognize

Returns:

null at end of input, true to continue matching.